Garmin 430W Annunciation for IFR

bruceg · #1 09-09-2013, 08:30 AM

A friends RV-7 is equipped with dual EFIS displays and a GNS 430W. The 430 is located outside the acceptable field of view for a left seat pilot and requires external annunciation to be legal for IFR ops.
Could someone who has been through the process of installing this annunciation guide me a bit with equipment selection?
Thanks!

Brantel · #2 09-09-2013, 08:36 AM

Depending on what EFIS is installed, it may be able to serve as the annunciator. Which does he have?

SteinAir · #3 09-09-2013, 10:35 AM

Brian is correct, it depends on the EFIS. Some of the will do the annunciations for you. Also, regarding the "field of view", it's not a hard/fast number that you automatically use to determine that, and I'd take a guess that if it's truly outside of that limit (that he correctly calculated) then it must be way far over on the right side of the plane....to a point where I'd think it might be slightly unusable if it's indeed that far away.

Just my 2 cents as usual.

Cheers,
Stein

BobTurner · #4 09-09-2013, 10:44 AM

Stein,

I'm pretty sure the installation manual (which of course is part of the TSO) specified field of view limits down to a fraction of an inch. I guess you could argue where the center of vision point was.
The installations that I've seen that clearly violate the placement guidelines have had the box on a center console, below the usual panel.

BobTurner · #5 09-09-2013, 12:05 PM

As noted above, check what the EFIS displays. I think all of them will show if you have selected VOR/ILS, or GPS (?), on the 430.
For the other annunciations (I think there are 5?) look in the 430W installation manual. You can buy a very expensive set of lights from Garmin or Mid-Continent; or you can just install 5 (?) indicator lights, labelled per the installation manual, within the field of view. There are pins on the back of the 430 to drive the indicators.With a small amount of work you can make them dimable.